thunderbird / thunderbird/thunderbird-android
Thunderbird tries IPv4 first before IPv6 for an IPv6 only IMAP mailserver.
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unconfirmed
- Dominant language
- Kotlin
- Stars
- 14k
- Forks
- 2.8k
- Avg merge
- 3d 3h
- Merged PRs (30d)
- 57
Description
Checklist
- I have used the search function to see if someone else has already submitted the same bug report.
- I will describe the problem with as much detail as possible.
App
Thunderbird for Android
App version
14.0
Where did you get the app from?
Other
Android version
16 - Graphene OS
Device model
Pixel 7 Pro
Steps to reproduce
- Setup a mailbox that is IPv6 only for IMAP and SMTPs
- Try and refresh and look in the logs on the mailserver
- See there are no connections made for a very long time, until finally it tries the IPv6 DNS and succeeds instantly.
Expected behavior
Should connect straight away depending if it is IPv4 or IPv6
Actual behavior
I suspect that it is trying IPv4 first and waiting for the timeout before trying IPv6.
Logs
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
No source file, test, or entry point is named. Start by reproducing the issue with an IPv6-only IMAP and SMTP mailbox on Thunderbird for Android, then inspect the mailserver logs to confirm whether an IPv4 attempt delays the IPv6 connection. Done means the app connects without the reported timeout behavior.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- android, kotlin
- Domain
- mobile, networking
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 42/100